US Bridges

Thomas Lk Haris DR over Stonefield Arch

Fair

Sonoma County, California · 0.1 MI N Fntaingrove Pkwy · Structure no. 20C0500

Built
1989
36 years old
Condition
Fair
inspected June 2024
Type
Arch - Deck
Other
Length
39 ft
1 main span
Daily traffic
500
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Thomas Lk Haris DR over Stonefield Arch is a other arch - deck carrying Thomas Lk Haris DR over Stonefield Arch in Sonoma County, California. It was built in 1989, so it is 36 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 500 vehicles a day, roughly 5% of them trucks, projected to reach 1,567 by 2044. The structure is 39 ft (11.9 m) long and 57 ft wide.

Location

Open in Google Maps
CarriesThomas Lk Haris DR
CrossesStonefield Arch
Location0.1 MI N Fntaingrove Pkwy
RouteCity Street 0
CountySonoma County
StateCalifornia
Coordinates38.4802, -122.72052
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeArch - Deck
MaterialOther
DeckNot applicable
Main spans1
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span39 ft (11.9 m)
Deck width57 ft (17.4 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2019)
Projected traffic1,567 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Thomas Lk Haris DR over Stonefield Arch built?

It was built in 1989, making it 36 years old in 2025.

What condition is Thomas Lk Haris DR over Stonefield Arch in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does Thomas Lk Haris DR over Stonefield Arch carry?

About 500 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Thomas Lk Haris DR over Stonefield Arch?

The structure is 39 ft (11.9 m) long with a longest span of 39 ft (11.9 m) and a deck 57 ft wide.

Who owns Thomas Lk Haris DR over Stonefield Arch?

It is owned by the City or Municipal Highway Agency.